Morpheel

Morpheel is the third boss in The Legend of Zelda Twilight Princess. In order to defeat him you must use your iron boots, to hold you in place, and your hookshot, to pull his eye out of one of its eight tentacles and hit it with your sword. Once you have done this three times Morpheel will burst out of the sand, to reveal its massive body, and start to swim in circles around the room. Take off your iron boots and chase after him. Swim in the opposite direction and lock on to the eye on the top of his head. Your hookshot will drag you onto his head so you can stab him in the eye. Repeat this process three times to defeat him and get the last piece of the fused shadow and a heart container.